Detecting mechanism for stop motions



March 1955 w. w. EGEE ET AL DETECTING MECHANISM FOR STOP MOTIONS Filed April 22, 1952 2 Sheets-Sheet l INVENTORS. J.W. BENNETT w.w. EGEE ATTORNEY.

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' March 29, 1955 w. w. EGEE ET AL 2,705,110

DETECTING MECHANISM FOR STOP MOTIONS Filed April 22, 1952 2 Sheets-Sheet 2 INVENTORS. J. W. BENNETT W. W. EGEE ATTO R N EY.

United States Patent DETECTING MECHANISM FOR STOP MOTIONS Walter Warren Egee, Yeadon, and John W. Bennett,

Philadelphia, Pa., assignors to Fletcher Works Incorporated, Philadelphia, Pa., a corporation of Pennsyb vanra Application April 22, 1952, Serial No. 283,682

7 Claims. (c1. 242-37 This invention relates to apparatus for detecting broken yarns in winding machines and the like and it relates more specifically to improved yarn break detecting mechanism for stop motions so that the actuation of a yarn receiving package will be discontinued upon the occurrence of a break in the yarn.

It is the principal object of the present invention to provide yarn break detecting mechanism in which a pair of intermittently coacting parts are provided for engagement by an unbroken yarn to actuate one of the parts.

It is a further object of the present invention to provide a yarn break detecting mechanism in which a pair of intermittently coacting parts are provided, one of which serves for an unbroken yarn as a guide for the yarn.

It is a further object of the present invention to provide yarn break detecting mechanism in which a movable detecting member is provided at a fixed location and a yarn guide is oscillated with respect thereto, the yarn in unbroken condition effecting one character of operation and the broken condition or absence of yarn permitting a different character of operation.

Other objects and advantageous features of the invention will be apparent from the specification and claims.

The nature and characteristic features of the invention will be more readily understood from the following description taken in connection with the accompanying drawings forming part hereof, in which:

Figure 1 is a front elevational view of a portion of a winding machine having the detecting mechanism of the present invention thereon;

Fig. 2 is a transverse sectional view taken approximately on the line 2-2 of Fig. 1; and

Fig. 3 is a fragmentary view in perspective and as seen from the rear and showing the detecting mechanism.v

t should, of course, be understood that'the description and drawings herein are illustrative merely, and that various modifications and changes may be made in the 11 structure disclosed without departing from the spirit of the invention. I

Like numerals refer to like parts throughout the ,several views.

Referring now more particularly to the drawings, the

detecting mechanism is shown in connection with a bobbin building mechanism of the character disclosed in the prior application of Hilmar Roessel, 'filedAugust 1, 1951,

Serial No. 239,703, now abandoned, although it is not limited to use with this specific bobbin builder.

A fragmentary portion is illustrated of the frame of a machine .for winding, twisting or the like and simultaneously producing a plurality of filled bobbins B or other yarn packages and in which, for each yarn. packor more yarn packages onto another.- The frame. 10, at a plurality of-locations, and for each bobbin B to be wound, may have a yarn guide eye 10a mounted thereon. Theframe 10 has disposed, in parallel relation-thereto,

age to be produced, yarn or thread is wound from one a horizontal traverse bar .11 which is supported and '"L'.

guided in any desired manner and is-reciprocated, with a. predetermined length of stroke, in a straight line and in predetermined vertical and horizontal planes by any desired reciprocating mechanism (not shown) but which is well known in the art.

The winding machine is also provided, in the customary manner, and in parallel relation to the frame 10 with a drive shaft 12, which is rotated at the desired speed, and

has secured thereto, for rotation therewith, a plurality of driving rolls 13, one for each bobbin B to be wound, the driving rolls each having a friction driving face 14, of cork or the like.

At the locations at the frame 10 at which each driving roll 13 is located, spaced bracket supports 15 are provided, each having an outwardly extending bracket arm 16. The bracket arms 16 have side recesses 17 at the front ends of which vertical guides 18 are provided. Each of the bobbins to be Wound may be carried on a spindle 19 which engages the inner faces of a pair of guides 18. The driving rolls 13, in engagement with the bobbins B hold the spindles 19 in engagement with the guides 18 so that the longitudinal axis of each bobbin B is constrained to move vertically in a straight path.

The bobbins B are illustrated, merely by way of example, as having a cylindrical section 20 of a length slightly greater than the stroke of the traverse bar.11, and a frustoconical base portion 21.

The structure heretofore described is conventional structure found in many winding, and twisting machines and is included merely by way of illustration and for purposes of explanation of the invention.

In order to separately disconnect the bobbins B from peripheral driving engagement with the faces of their driving rolls 13, lifter mechanism of any preferred type may be employed. One suitable structure for this purpose comprises a pair of spaced yokes 22 and 23, pivotally mounted on pivots 29 carried by the frame 10. The yokes have corresponding upwardly extending arms 22a and 23a between which a lifter wire 24 extends, and forwardly extending arms 22b and 23b which are connected by a bar 25. The bar 25 causes simultaneous movement of the yokes 22 and 23 and is of sufficient weight so that it supplies at least a part of the weight for urging the arms 22b and 23b downwardly and the arms 22a and 23a and lifter wire 24 forwardly upon release of the yoke 22, as hereinafter explained.

It will be noted that, upon forward swinging of the yokes 22 and 23, the lifter wire 24 is brought into engagement with the face of the cylindrical section 20 of the bobbin B, or the yarn thereon, raises the bobbin B vertically as guided by the guide 17 and, by separation of the bobbin B from engagement with the driving roll 13, stops the rotation of the bobbin B until the yokes 22 and 23 are returned to their upper or rear positions.

In order to hold the yokes 22 and 23 in rearward position, so that the lifter wire 24 is out of engagement with the bobbin B, a latch lever 26 is provided, pivoted on the frame 10 by a bolt 27. The latch lever 26 has a shoulder 28 for supporting engagement with the arm 22b.

Upon swinging movement of the latch lever 26 out of v for each bobbin B to be wound, suitable yarn guiding and laying mechanism is provided. While any preferred type of mechanism for this purpose may be used, the mechanism shown in the application of Hilmar Roessel, above identified, is satisfactory. As illustrated this mechanism includes a block 30 secured to the traverse bar 11 by bolts 31. The block is provided with spaced posts 32 and 33 between which a holder block 34 is mounted on a pivot pin 35. The holder block 34 has mounted therein a yarn guide arm 36 having an offset or bent end 37.

The block 30 is provided, for purposes to be explained, with a horizontally extending abutment pin 38 which is threaded into the block 30 and has a lock nut 39 thereon for locking the pin 38 at the desired position of longitudinal axial adjustment. The block 30 also has carried thereby a yarn guide member 40 which includes a horizontally extending leg portion 41 with an upwardly extending leg 42 connected thereto. A leg 43 spaced from and parallel to the leg 42 is connected thereto by an end and is supported in parallel relation to the frame in any desired manner such as by brackets 46. The bracket 46 is secured to the frame 10 by bolts 46a. At predetermined locations on-the-bar 45, and .preterably beyond the smaller end of each of the bobbins B to be wound, {a mounting block 47 'is provided and is'sec ured to'theb'ar45 at the desiredposition of adjustment by studs 48,

On one side of the block 41a control element or knock-off plate 49 is pivotally mounted by a pivotpi'n 50. The plate 49 isof resilient material and is adapted, under certain conditions, as hereinafter pointed out, to engage with and movethe upper end of the latch lever to release the yoke arm 225. T heplate 49, intermediateits ends, isprovided with a'longitudin'ally elongated slo't51.

'On the rear face of the block 47, a bushing 52 is provided having an enlarged head '53. A feele'r is =pivotally mounted on the bushing "52 and has an upwardly extending feeler arm 54 with 'a close coil 55 mounted on "the blushglig 52 and an actuating arm '56 extending into the s 0t The 'fee'ler wire as thus constructed with the coil 55 forming part thereof is compact and resistant'to shocks. A'limitpin '57, mounted on the rear'face of the block 47 is e'ngageable'by the feeler arm '54 and limits the downward movement of the actuating arm 56 and the knockoff plate 49. A guard loop 58, carried by the block '47 and with its legs spaced to clear the guide member 40, aids in protecting the feeler arm 54.

The mode of'operation will now be pointed out.

With bobbins-B supported on spindles 19, and with the periphery of eachof the cylindrical sections Zil in engagemerit with the face l t-of a driving roll 13, "rotary movement is imparted to thebobbins B by the rotation of the shaft 12. At the same time'the traversebar 11 is reciprocated and carries with it the yarn guide block and the 'yarn guide rod 36 pivoted thereon.

Theyarn to be wound on each bobbin B, whether the machine is a twisting machine, a doubling machine, or a winding machine. is supplied from any suitable source under the desired tension, and passes upwardly'through the guide eye 10a, around the 'guide 40, at or below the junction ofthe leg 43 with the end '44, around behind the .guide bar36, at or-below-the root ofthe end 37, and onto thebobbinB. The turning movement of the bobbin B and the reciprocation of the guide bar 36 distributes the yarn on the bobbin l3.

Asthe traversebar '14 approaches one end of its stroke (at theleft as shown in Fig. 1 or at the right as shown in Fig. 3) the pin 38 approaches the knock-on plate 49. Atthe same time, the yarn in engagement with theguide is brought into engagement with the fe'eler arm54 of the =feler wire and moves the feeler wire around the pivot providedby the bushing 52. The actuating arm 56 is raised and in turn by its engagement in 'the slot '51 swings the knock-oltplate49 upwardly so'that it clears'the .pin 38 as'thepin 38 advances.

Ifno .yarn is available at the guide 40, by reason of a break,exhaustion of the supply, or for any fother rea'son, to actuate'the 'feeler arm 54, the knock-ofiplate 49 is not swung upwardly as heretofore referred to so as to be clear of the abutment pin 38. The abutment pin38,it' the knock-oft plate '49 is not swung upwardly, strikes the abutment plate 49, moves it against the upper end'ofthe latchleverl'and swings the latch lever 26 so that the shoulder Ztiis moved out of supporting engager'rie'nt'with the arm2'2b of the yoke '22. The yokes '22 and 23 swing forwardly and b ing the wire 24 to bobbin elevating position. Upon establishment'or reestablishrnent oftheyarn at the feeler arm 54 and resetting of the yokes 22 and'23, winding can be undertaken or resumed.

The detector mechanisms as'herein described has been found'particularly suitable for very fragile yarns,'under extremely light tension,-although it is 'notlimited to "use with yarns of that character.

We claim: 7

1. 'Thread break detecting mechanism 'for winding machines having means for rotating on its axis a yarn receiving package and a traverse member oscillatable in a path parallel with respect to said axis comprising a yarn :guide member oscillatable with said traverse member a predetermined path for guiding the yarn passing towards the yarn package, a fixedly positioned 'feeler member 110 cated in said predetermined path and having a finger for movement of said guide member therebeyond in the abmember controlled by said feeler member and sence of yarn on said guide member and for engagement by the yarn guided by and engaging said guide member. a control member controlled by said feeler member and movable thereby from one position to another position, and an abutment member movable with said guide member for engagement with said control member in said one position of the control member.

2. Thread break detecting mechanism for winding machines having means for rotating on its axis a yarn rcceivingpa'ckage and a traverse member oscillatable in a path parallel with respect to said axis comprising a yarn guide member oscillata'ble with said traversemember and having spaced portions spanned by the yarn passing to wards the yarn package, the space defined between said spaced portions moving in a predetermined path, a fixedly positioned feeler member in said predetermined path having a finger for reception in the space between said spaced portions in the absence of yarn spanning said space and 'foren'gagement by the yarn guided by said guide member and spanning saidspa'ce, a'controlmember controlled by saidfeeler'rnember 'and'nrov'able thereby from one. position "to another position, "and an abutment membermovabl'e'withsai'd yarn guide membertor engagement with said control member in "o'neofthe positions of the Control member.

'3. Thread break detecting-mechanism for Winding machines 'havingmeans 'for rotating on its axis a yarn re- 'ceiving package and 'a traverse member oscillatable in a path parallel with respect to said axis comprising a yarn fguide member oscillatable with said traverse member and having spaced portions spanned by the yarn passing towards the yarn'package, the space defined between said s'paced portions moving in a predetermined path, 'a fixedly positioned feeler member in said predeterminedpath and having a 'firrger for reception in the space between said sp'ac'ed portions in the absence of yarn spanning said space 'and'forengagement by the yarn guided by said yarn guide member and spanning said space, a knock-01f member controlled by said feeler member and r'novablethereby from a knock-off position to an inactive position, and an abutment member movable jwithfsaid yarn iguide member for engagement with said knelt-off memberin the knock-oil position of the knock-off member.

4. Thread break detecting mechanism comprising a yarnguidemeniber, means for oscillating said yarn guide memberin "a linearpath, "said yarn zguide member having spaced portions over which theyarn passes, a feeler member-ate fixed location'in'said path, said feeler member having a finger for reception inthe space between said spaced portions in the absence of yarn spanning said space and 'for engagement by the yarn guided by said yarn "guide member and 'spannin'g'said space, a control movable therebytrom "one "position to another position, and an abutmentmember movable with said yarn guide member for engagement with said control member in one 'positionofthecontrol member.

5. Thread break detecting mechanism comprising a yarn guide member, meansfor oscillating-said yarn guide member ina linear'parnsaidyam' guide member having spacedpnrtiom overwhich theyar'ntpasses, a feeler member 'ata fixedilofcation in saidpath, said 'feeler member having afin'ger for "reception inthe space between said spaced portions in the absence "of yarn -spanning said space "and for -engagement by-the yarn guided by said yarn guide member-and spanning said space, a knockoffmeinbe'rcontrolled by said feeler member and movable thereby from "a knock-off positi'onto an inactive position, and an abutment member movable with said knock=oif member for 'engag'ement with said knock-bit member in the knock-off "position of the knock-off memher.

6. Thread "break detecting mechanism comprising a yarn 'gui'demember, fa feeler member, one of sai d"mem- 'bers having azpair of Spaeed'le'gs for spanning engagethem by'the Ly'arn andthe-oth'er ofs'aid 'membershaving amovablefinger 'for reception inthe space between'said legs in the absence of yarn spanning said space and for engagement by yarn spanning said spaced legs, memhere for reciprocating oneof said members with respect to the other,-and a control member controlled by the positioning of said finger'by engagement of -yarn with said finger.

7. Thread break detecting mechanism comprising a yarn guide member having a pair of spaced legs for spanning engagement by the yarn, a feeler member having a finger for reception in the space between said legs in the absence of yarn spanning said space and for engagement by yarn spanning said spaced legs, members for reciprocating said yarn guide member with respect to said feeler member, and a control member controlled by the positioning of said finger by engagement of yarn therewith.

References Cited in the file of this patent UNITED STATES PATENTS FOREIGN PATENTS France Apr. 8, 1914 

